Power controlled rip-sawing machine



Nov. 5, 1929. J. E. HlRsT 1,734,090

POWER CONTROLLED RIP SAWING MACHINE Filed April 9, 1929 ATTORNEY. v

Patented Nov. 5, 1929 JAMES a.V HIRsT, or OINOrNNATI, OHIO,l Assenon Toi THE J. A. BAY a EGAN COMPANY, or CINOINNATL OHIO, a Ooa'roRA'rroN or OHIO POWER OONTROLLED RIP-Smyrne MACHINE' Application-'filed Aprn' a, 1929. vserial n5353370( The present invention relates to power rip sawing machines of the class having an endlessV chain conveyor to discharge the work therefrom, and more' particularly to that portion of the table at the rear end of' the machine which is adjacent the chain conveyor tO support therwork when being discharged.

The object of my invention is to remove a small' portion of the machine table, adjacent I0 the chain, and replace it with a yieldably mounted' arln, whichy arm will normally support' the work as it is' discharged from thev machinel but which will swing outwardly and downwardly in the event that any por- 1'5 tion of thel workV passing thereover should be comecaught or jammed' such, for instance, as boards having splinters extending therefrom or boards that are warped or contain knots that extend below their lower surface.

nother Object of this invention isvto provide ayieldably mounted arm, as above described, which will automatically be restored to its normal position after the defective workA has been dischargedwithout the aid of mechanical devices,y such, for example, as springs,but will be returned by lgravity due to its peculiar" construction and mounting upon the machine.

30 My invention. consists in the construction, combination, location and arrangement of vp'art's,a`s herein fully set forth and claimed.

In' the drawing y d Y Fig. 1 is a rear perspectiveview' of a power driven rip sawing machine shown in broken lines, lwith the present invention installed thereon and appearing in full lines :Fig 2 isa fragmentary vertical sectional view through the rear end of: the-machine showing the angle of the pivot pin upon which the swingingarm is mounted;

Fig.. 3 is a fragmentary endelevation of the table ywiththe inventionrinsta'll'ed,part of the tableappearingin/section;`

Fig. 4 is a rear end elevational detail ofthe swinging arm; and

Fig. 'is a plan view thereof. f

Referring tothe drawing, the invention is shown as'applied to a power driven rip sa-w- 50. ing machine, which machine comprises, gen*-l erally, frame 1,`having a way 2 in itfsltop to receive the endlessl chain conveyor. 3, the' numeral'll designatingthe rear end of the Ina-- chine, or the end from which the work isl dis` 56 charged. 1 f

yl`lie chain'conveyor 3, as' clearly shown in Fig.y 2', is composed ofl'inks 5;, flexibly joined together at 6 and received-l over the-driving? sprocket 7, which sprocket is located at thel 50 rear end 4C ofthe machine and driven by'l any suitable source of power' (not shown); .l

AS the chain passes forwardly, withinthe way 2, and over thedriving sprocket 7,i-t is passed backwardly and within thel frame Y1', 65 through opening8, forvconnectionf with the'- i'dler sprocket (not shown).v l Y L In operation of the ymachne, work is passed therethrough by the chain conveyor 3 and discharged at the rear'end l off-said 1nachine,-said 70 work passing vover the top surta-oe 9 ofarmlO. Y

' Arm 10, as shown in Figst and 5,Y is provided with aboss'11,fthrough-which\a-hole'lQ is drilled at anvangle with reference tothe 7,5 to'p surface 9, Ythe purposel Ot whichf willy be explained more fully: as the description proceeds. -Said arm 10'is also provided with a weighted segment 13, which segmentis vpreter'ably cast integral with said.A arm. 80 Plate 14 Figf) ls mount'edfbeneath table 15 and atiixed thereunder by screws 161 'Said plate 14 is provided with adownwardly ex; tending neck.. 17, through which neck? and plate a hole 18 extends,ffor the'purpose'of 85 receiving the pivot pin 19, as clearly shown in Fig. 2. This pin 19 is held within the hole 18 ofV neck 17 by a set-screw 20. The lower end of the pivot pin 19 is providedf withl a hanged head 21, which head supports the lower race 22 of ball-bearing 23, the upper race v24 of said ball-bearing supporting the lower side of the boss 11 and, in turn, the

entire weight of arm 1() and segment 13, said pin being passed through the hole 12 in said boss 11. The head 25-of arm 10 normally fits within the opening 26 of table 15, as clearly Y strike below the reduced edge 25a of said head,

saidhead and arm 10 will immediately move outwardlyY and downwardly,.due to the pivotal connection of said arm upon the pivot pin 19, said downward and outward movement of said head being effected by the peculiar angle at which the hole 12 in said arm is drilled and due to the peculiar angle at which the pivot pin `19 is mounted beneath the table 15.01 the machine. When any clogging action, as just described. takes place and as the head of arm 10 is forced to move outwardly and away from the opening 26 in the table. the weighted segment 13 is likewise caused to move upwardly towards the top of said table. As soon as the clogging or wedging 'action has been overcome, due to the removingof head V25 from opening 26, said head is again free to be returned to its normal position within said opening'26. which latter movement of said head is accomplished by gravity due to the'weightedsegment 13 moving the arm 10 about the pivot nin 19.

With this construction it will be clearly apparent thatthe head 25 of arm 10 is free to move in a radius about the pivot pin 19 when necessary. due to uneven work, or work havingl obstructions extending therefrom. striking the inner edge of said head. and it will also he clearly apparent that when the head Y ismovedoutwardly. downwardly and from within opening 26 ofthe table. said uneven work may be readily discharged whereupon the weight of ysegment 13 will be caused. bv

Y gravity, to return. said head to its normal positionvwithinV the opening 26 of the table 1 5. In Vprior powerrip sawing machinesV any work. becomingr clogged or caught between Vthechain conveyor 3 and that portion of the table'l ladjacent the discharged end' of the conveyor would necessitate the immediate stopping of the machineto prevent 'damage thereto.` or to the work, or possibly toV the workmen operating the machine..V

With my'v improved pivotally mounted arm,

` however, the above objections have been satisfactorily remo'vedfrom rip sawing machines, thusjavoiding the stopping lot the machine while working upon rough or uneven boards, ,An'advantage of a safety device of this character Vis the simplicity and economy of parts', there being no springs or other mechanical means to normally hold the head 2 5 within the opening 26 of the table 15, this movement being satisfactorily accomplished by gravity through the weighted segment 13.

It is to be understood that certain changes and modifications of the invention can be made without departing from the scope or spirit thereof, as defined in the claims.

What I claim as new and desire to secure by Letters Patent is:

1. In a material cutting machine of the class described, the combination of a frame, means for feeding the work to bev cut therethrough, a table for said frame having an opening adjacent the rearward end thereof, an arm pivotally mounted beneath said table at an angle lthereto and having a head, the upper surface` of which is flush with the top' of said table, and weighted means carried by said arm for normallv supporting said head in the opening of said table.

2. In a material cutting machine ofthe class described, the combination of a frame, means for feeding the work to be cut therethrough comprising an endless conveyor chain extending horizontally across fthe top of said frame. thence downwardly overa sprocket wheel and rearwardly therefrom and through the frame, a table for said frame cut away at lthe rearward end thereof and adjacent saidchain. an armrpivotally and angularly mounted beneath said table fand having a shelf. the upper surfaceof which. shelf is fiush with the upper surface offsaid table. and means for normally supporting said shelf in the opening of said table.sa,id means comprising a weighted segment integrally attached t0 said arm. i' J 3. In a material cutting machine. of the class described, the ycombination lwith a.

frame. a table. mea nsrrfor feedinfr'the material to be cut, including an, endless` conveyor chain. the upper` portion of which travels horizontally-ina way insaid table. an arm angularly pivoted beneath the table and in-v cluding a shelf. an opening in the discharge end of said table to receivev said shelffa'nd a counter-weight carried bvrsaid arm to normallv support said head within said opening, said head adapted toswing outwardly, downwardly and sidewise simultaneously 'out` of the path of said chain in the event that the material being fed through "thei machine should become' clogged or, jammed between said chain and head. f

4. In a machine of the-class described, in-

cluding a work table. the combination withV face of said table and to return it to said flush 'V130 position in the event it is moved by uneven material, substantially as set forth and for the purposes specified.

5. A swingable support for rip sawing machines of the class described, comprising a 

